Question

resolva a equaçao: A)(x-3) (2x-1) + (x+2) (2x+1)= 17

Answer 1

(2x^2-x+6x-3)+(2x^2+x+4x+2)=17
(2x^2+5x-3)+(2x^2+5x+2)=17
2x^2+5x-3+2x^2+5x+2=17
4x^2+10x-1=17
4x^2+10x-18=0
delta = 100+288
delta= 388